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Rotary fluid machine operable as a motor or a pump

  • US 9,334,736 B2
  • Filed: 01/07/2014
  • Issued: 05/10/2016
  • Est. Priority Date: 07/08/2011
  • Status: Active Grant
First Claim
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1. A rotary fluid machine comprising:

  • first and second bodies, the bodies being rotatable relative to each other through at least 360° and

    arranged one inside the other to define at least one working chamber there between;

    at least one gate supported by the first body, each gate having;

    a planar axial surface and respective rounded corners at each end of the axial surface;

    the second body comprising a circumferential surface forming a surface of the working chamber, the circumferential surface having an intermediate surface extending in an axial direction and contiguous curved surfaces on each side of the intermediate surface and extending in a radial direction to form with the intermediate surface a U shaped channel, wherein when the planar axial surface is adjacent the intermediate surface, the rounded corners and the curved surfaces lie closely adjacent to and substantially parallel with each other to form a tolerance gap between the at least one gate and the circumferential surface.

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